Evaposrust

[canuck750]

This was on sale for $45.00 a pail so I decided to give it a try. I have a couple tanks that need the rust cleaned out before I send them off to painting. I needed two pails to completely fill the LeMans tank. My painter was charging a hundred bucks to clean a tank so if this works I am ahead. I cleaned the tank with an industrial degreaser solution and ran a garden hose with fresh water through then left it to drain and dry.



It is non toxic, non flammable product (so its probably not too good )



I will leave it to soak for a couple days then drain the rust removed back into the pails to reuse.

The instructions say to rinse with fresh water and then to prevent flash rust,  slosh some more clean solution through. I think I will use an acid metal prep for the last step.

Hopefully this gets all the rust out.

[Triple Jim]

It is non toxic, non flammable product (so its probably not too good )

I've heard great reports from people who used Evaporust on motorcycle parts, including tanks.  I have a gallon that I'm about to try on a rusty tank.  I'm going to just put about a quart in, and shake it around every time I walk past for a few days, and see if that works.  I'll be interested in your results.  I understand that you can save the used Evaporust and use it many times, until it gets too slow.

[Perazzimx14]

1 gallon milkstone reomver and a pint of isopropyl in will garner the same results for under $20.00.

[motoital]

I've use this stuff before and it works good. Here are some tips I've learned through use. Only use it on painted parts is its fresh and clean and that goes for chrome parts also. After use filter it though a coffee filter if you plan on reusing. If not it will start to darken the parts. For gas tanks its best to try and fill up the insides completely if you can. If you don't have enough product to do that I would fill up as much as you can then rotate the side it's laying on from time to time. Use a rubber stopper in place of the gas cap. The splash technique doesn't work to well. It also starts tostink after a while.

[Groover]

Is the acid metal prep you plan on using for the "liner" so-to-speak? I used evaporust on a tank with a few rust spots inside and it worked great. I let the final application (after dumping the main application) dry in the tank before giving the tank to the painter to prevent the flash rust before filling it with gas after the paint job. I think the instructions said that it would protect the metal from rusting that way for up to two weeks. The painter had my parts for 4 months and no rust appeared. I had the cap and tap holes completely plugged however. When I got the tank back, I flushed it with clean gas a few times then filled it. It's keeping up well so far.

I plan on using it again on a different tank that has a completely shot liner, but that one may need some special attention after the evaporust application for liner coating, which is why I'm asking about the metal prep you mention.

[canuck750]

Is the acid metal prep you plan on using for the "liner" so-to-speak?

Metal etch (online from Eastwood Automotive) is a metal prep acid, it removes rust but it etches the metal surface so it can better accept a primer or in this case a liner. I don't think it is absolutely necessary with a good liner product like Caswell but it won't hurt.

Cheers
Jim

[Groover]

Gotcha. I have used Eastwood's Fast Etch on some other stuff (good stuff). I've wondered about using that stuff as a liner actually. Probably not the best solution I guess, but I think it would work too. Maybe for smaller liner patches.

[canuck750]

Quick update on Evaporust for removing rust out of a tank. I filled a Le Mans tank to the brim with Evaporust to the brim and left it to sit for a couple weeks, drained it last night, clean as a whistle. It gets my vote, another tank is soaking now. I should be able to reuse the Evaporust on many tanks.

[organfixsing]

I think you will find that the product is mainly Phosphoric Acid (Coca Cola has a little in it). This coverts Ferric Oxide (rust) to Ferric Phosphate which neutralizes the rust. It is a bit of a white powder which should be brushed off before painting. The item should be painted / sealed in some manner as soon as possible. My 2 cents.
Cheers
Brian

[flangeman_70]

I think you will find that the product is mainly Phosphoric Acid (Coca Cola has a little in it). This coverts Ferric Oxide (rust) to Ferric Phosphate which neutralizes the rust. It is a bit of a white powder which should be brushed off before painting. The item should be painted / sealed in some manner as soon as possible. My 2 cents.
Cheers
Brian

It is not acid!
It is EDTA ethylenediaminetetr aacetate which by itself is harmless and it sometimes used as a quack 'cure for all' but after chelation the metals pulled into solution are extremely hard to deal with http://www.aquachem-inc.com/Simplified%20Removal%20of%20Chelated%20Metals-MF.pdf
MSDS for Evapo Rust http://www.evapo-rust.com/info/EvapoRustMSDS.pdf

Regards,

Adam

[jmac851]

I used one called Esprit and it worked fine.  They sell in in a concentrate that you add water to in order to make the quantity you need. A one gallon jug makes up to 10 gallons of product. ($90)  WD-40 also makes one that is the same. They sell it at Walmart for about 25 per gallon.  I used it in my EV tank to clean it out.  I should have used a strong soap solution first to get the varnish out as the Esprit leaves some of the heavy stuff behind.

[papatom]

If you aren't in a hurry and you' re going to Caswell it, vinegar will also dissolve the rust.

[wymple]

I have used Evaporust on old gun parts, toss them in and let them sit for a couple days. Stuff works great. I have also used vinegar, and it's not bad but Evaporust is considerably better, IMO.

[Sasquatch Jim]

  Quote, "It is EDTA ethylenediaminetetr aacetate".

  That's easy for you to say.

[steven c]

 If I pored that on my S10, the truck would disappear.

[NCAmother]

I've used vinegar in a tank and it worked perfect, but flash rusted within 1/2 an hour.  I rinsed it with just water a few times.  How do you prevent flash rusting?

[guzzista]

I used WD40 ( about a quart), splashed it around from time to time , and left it in there for a couple weeks. When the tank went to get painted ( being done by Body Shop students at local JC) I asked they leave cap and petcocks on, but that hasnt happened to my knowledge. When its finished l'll be able to tell how it worked out

[Perazzimx14]

Rinse the tank out with as hot of water as you can get out of the faucet. Drain it out and immediately after it is drained pour in and swish around  a pint or two of high percentage rubbing alcohol or denatured alcohol to suck up the remaining water. Dump that and fill with gasoline or if you are not going to use for a while a few ounces of WD40 or engine fogging oil swished around to coat the interior.  Even doing this you still might get a small amount of "flash" rust. Its not enough to worry about.